HOMEVULNERABILITIESCVE-2001-0500
CRITICALPOC

CVE-2001-0500

NVD-CWE-OtherPublished: July 21, 2001· Updated: Jun 16, 2026

10.0
CVSS v3.1

Official Description

Buffer overflow in ISAPI extension (idq.dll) in Index Server 2.0 and Indexing Service 2000 in IIS 6.0 beta and earlier allows remote attackers to execute arbitrary commands via a long argument to Internet Data Administration (.ida) and Internet Data Query (.idq) files such as default.ida, as commonly exploited by Code Red.

NVD Source

Technical Analysis

CVE-2001-0500 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A proof-of-concept (PoC) exploit exists for CVE-2001-0500. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityC
IntegrityC
AvailabilityC
AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected Vendors & Products

Microsoft3 product(s)
index serverindexing serviceinternet information server
Source: NVD CPE · 3 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://www.cert.org/advisories/CA-2001-13.html
PATCHhttp://www.cert.org/advisories/CA-2001-13.html

All References (14)

→
http://www.cert.org/advisories/CA-2001-13.htmlExploit · Patch · Third Party Advisory · US Government Resource
→
http://www.ciac.org/ciac/bulletins/l-098.shtml
→
http://www.iss.net/security_center/static/6705.php
→
http://www.securityfocus.com/archive/1/191873
→
http://www.securityfocus.com/bid/2880
→
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-033
→
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A197
→
http://www.cert.org/advisories/CA-2001-13.htmlExploit · Patch · Third Party Advisory · US Government Resource
→
http://www.ciac.org/ciac/bulletins/l-098.shtml
→
http://www.iss.net/security_center/static/6705.php
→
http://www.securityfocus.com/archive/1/191873
→
http://www.securityfocus.com/bid/2880
→
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-033
→
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A197

Quick Facts

CVE IDCVE-2001-0500
CVSS Score10.0 / 10
SeverityCRITICAL
WeaknessNVD-CWE-Other
CISA KEVNo
ExploitPOC
Affected1 vendor(s)
PublishedJul 21, 2001

Related CVEs (NVD-CWE-Other)

CVE-2005-1560
10.0
CVE-2005-1452
10.0
CVE-2005-1559
10.0
CVE-1999-0754
10.0
CVE-2005-1449
10.0
CVE-2005-1596
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2001-0500 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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